Operating means for pinking devices



1941- v. J. SIGODA 2,230,313

7 OPERATING MEANS FOR PINKING DEVICES Filed March 10, 1958 3 Sheets-Sheet 1 NVENTOR. Vm 7'01? 15/ 600A Feb. 4, 1941.

v. J. SIGODA 2,230,313

OPERATING MEANS FOR PINKING DEVICES Filed March 10, 1938 3 Sheets-Sheet 2 IN VENTOR.

V/CTORl/S/G'ODAJ BY K M v ATTORNEY.

Feb. 4, 1941. v SIGQDA 2,230,313

OPERATING MEANS FOR PINKING DEVICES Filed March 10, 1938 3 SheetsSheet 3 INVENTOR. VICTOR 1/. 5/6ODA ATTORNEY.

Patented Feb. 4, 1941 UNITED STATES PATENT OFFHCE.

OPERATING MEANS FOR PINKING DEVICES Application March 10, 1938, Serial No. 195,037

15 Claims.

This invention relates to operating means for pinking devices and more particularly to a simple, compact and efficiently operating means for actuating the movable trimming or pinking 5 member in synchronized relation with the feed dog of a standard type sewing machine and which may be readily applied to such machine without necessitating any material modifications in the arrangement of its mechanism or structural alterations in the parts thereof.

A more particular object of the invention is to provide a very simple addition to such standard sewing machines whereby intermittent rotation is imparted to the pinking or trimming member from the needle actuating shaft of the machine and in properly timed relation to the feeding movements of the four-motion feed dog.

In the adaptation of the present invention to that type of machine in which the pinking membar is mount-ed for rotative movement in a horizontal plane at one side of the feed dog, I mount a pair of shafts on the underside of the machine bed for oscillatory rotation. At their corresponding ends these shafts are operatively connected with the needle actuating shaft of the machine, and, at their opposite ends, one of said shafts is operatively connected with the feed dog while an operating connection is provided between the other of said shafts and actuating means for the pinking member. Preferably the two operating shafts for the feed dog and pinking member are arranged in nested or telescoped relation whereby the mounting of the same on the machine bed plate is simplified.

35 With the above and other objects in view the invention consists in the improved operating means for pinking devices and in the form, construction and relative arrangement of its several parts, as will hereinafter be more fully described, illustrated in the accompanying drawings and subsequently incorporated in the subjoined claims.

In the drawings wherein I have illustrated one simple and practical embodiment of the present invention, and in which similar reference characters designate corresponding parts throughout the several views:

Fig. 1 is a topplan view, partly broken away and showing one form of pinking device to be operated by the present invention,

Fig. 2 is a side elevation,

Fig. 3 is a bottom plan view,

Fig. 4 is a transverse section taken on the line 4-4 of Fig. 3,

Fig. 5 is a similar sectional view taken on the line 5-5 of Fig. 3,

Fig. 6 is an end elevation,

Fig. 7 is a plan view of the pinking device on an enlarged scale, certain of the parts being broken away,

Fig. 8 is a detail plan view, the throat plate and pinker being removed,

Fig. 9 is an enlarged detail elevation of the feed dog and the means for operating the pinker actuating means and,

Fig. 10 is a detail vertical section taken on the line Ifl-l of Fig. 7.

Referring in detail to the drawings, for purposes of illustration I have shown a well-known standard make of sewing machine, having the usual bed or cloth plate with the hollow pedestal 6 at one end thereof and the laterally extending overhanging arm i at the upper end of said pedestal, provided with the guide head 8 for the needle vibrating mechanism, actuated by the horizontal shaft 9 extending through the arm 1 and driven from a motor or other suitable source of power.

Beneath the head 8 the throat plate H1 is mounted in the bed or cloth plate 5 in flush relation with the upper surface thereof and is provided with the usual slots in which the fabric gripping and feeding parts of the four-motion feed dog ll operate. This throat plate, of course, is also provided with the usual needle opening l2 through which the vertically reciprocating or vibrating needle l3 operates.

While the present invention is not necessarily limited to use in connection with a specific type of pinking device, for the purpose of this explanation, I have shown a pinking or trimming device of the novel character shown and described in my pending application for patent, Serial No. 45,787, filed Oct. 19, 1935. It will sufiice for the purpose of clearly disclosing the purpose and operation of the present invention to state that the pinking device includes an annular trimming or pinking member M which is mounted to rotate in the horizontal plane of the throat plate Ill, at the inner side of the feed dog H, and has radially disposed pinking teeth on its upper surface. This pinking ring or member is intermittently rotated in one direction, in correspondence with the intermittent feeding movement of the fabric material, by a clutch device arranged within and operating in the plane of said pinking ring. This clutch means includes the oscillatable disk l5 which is provided near its periphery and adjacent to feed dog H with a vertically extending opening I6 for a purpose which will shortly become apparent. The clutch means is covered by a plate I! upon which a pressure roller I8 is suitably mounted, exerting downward bearing pressure upon the edge of the fabric immediately above the teeth of the pinking member I4 and rearwardly of the needle opening I 2 in the throat plate I0.

Upon the underside of the bed plate 5 and at one side of its center longitudinally extending nested or telescoped shafts I9 and 20 respectively are supported in suitably spaced bearings 2|. The inner shaft I9 has a driving connection at one of its ends through the gears 22 with the shaft of a rotary hook or thread looper indicated at 23. The shaft I9 is continuously driven in the operation of the machine by a belt 24 or other suitable driving connection between the other end of said shaft and the needle actuating shaft 9.-

The outer tubular shaft 20 has an arm 25 suitably fixed to one end thereof upon which a guide block 26 is swiveled as at 21, for sliding movement inaslot 28 provided in a part of the feed dog II. The arm'25 will therefore impart avertical movement to the feed dog at the end of its horizontal reciprocating motion in each direction.

The shaft 20 is oscillated relative to'the shaft I9 by the connecting rod 29 between the arm 39 fixed on the other end of said shaft and the eccentric 3| fixed to the needleactuating shaft 9.

The means for operating the rotary hook or looper 23 and for vertically moving the feed dog II, as above described, is well-known in the art and constitutes no part of the present invention.

At the opposite side of the center of the bed plate 5, a second pair of nested or telescoped shafts 32 and 33 respectively are mounted, in parallel relation to the shafts I9 and 20, in suitably spaced bearings 34. The inner shaft 32 at one of its ends is provided with the crank arm 35 pivotally connected with the rigid arm 36 of the feed dog I I. The corresponding end of the outer tubular shaft 33 is also provided with an arm 31 pivotally connected as at 38, to one end of an op-' erating member 39. The other end of this member is provided with a slot 49 receiving the guide block 23 by which said member is supported. The latter end of said member 39 is also formed with an upwardly projecting 111g 4| loosely engaged through the opening I5 of the pinker actuating clutch disk I5.

To the other end of the shaft 32 an arm 42 is fixed. An arm 43 is also fixed to the corresponding end of the tubular shaft 33 and is provided with a slot 44. A connecting rod 45 has its upper end connected with the arm 46 of aneccentric- 46 fixed on the shaft 9 and has an adjustable connection 41 at its lower end with the slotted arm 43. A rod 48 has its lower end pivotally connected as at 43, with the arm 42 and at its upper end is connected with the arm 46 of eccentric 46 by'the pivotal connection 59 which is also common to the connecting rod 45. In this manner it will be seen that independent oscillatory rotary .movemen ts will be impartedito the shafts 32 and 33 from the continuously rotating needle actuating shaft 9. By adjusting the connection 41 on the slotted arm 43 towards or from the axis of sleeve 33, the throw of the operating member 39 and therefore the degree of rotative movement of the pinking member I4 with respect to the feeding movement of the dog II may be regulated as required.

In the operation of the mechanism above described it will be apparent that after each stitch forming operation, shaft 32 will be rocked or oscillated to impart a horizontal feeding stroke to the dog II and simultaneously therewith shaft 33 will also be oscillated to move operating member 39 in the same direction as the feed dog so that the lug 4| of said member operates the clutch disk I5 to rotate pinking ring I4 in the same direction as the movement of the feed dog and for the required distance in order to accurately make the pinklng cut in the edge of the fabric. Both of these oscillating movements are transmitted to shafts 32 and 33 respectively through the medium of the single eccentric 46 on the needle actuating shaft 9. It will therefore, be evident that an operating mechanism of this kind for the feed dog and the pinking member is admirably adapted for high speed operation.

From the foregoing description considered in connection with the accompanying drawings the construction, manner of operation and several advantages of my present invention will be clearly and fully understood. In view of the extreme simplicity of my improved pinker operating means, it will be manifest that such a device is readily applicable to standard type sewing machines without material structural alterations thereof, and at minimum cost. The device is also positive and. reliable in its functional operation and not likely to get out of order. I have herein shown and described one practical embodiment of my present improvements which has given excellent results in practice. Nevertheless, it is to be understood that the essential features of the present invention may also be incorporated'in various other alternative structural forms-and I therefore reserve the privilege of resorting to all such legitimate changes in the form, construction and relative arrangement of the several detail parts, as may fairly be comprehended to be Within the spirit and scope of theappended claims.

I claim:

1. In combination with a fabric trimming member and feed dog, means for actuating said trimming member, including a clutch element,

two shafts operatively connected with the feed dog and clutch element respectively, a driven shaft, a power transmitting-member on said shaft, and means operatively connecting said member to said two shafts to impart relative oscillatory rotation thereto.

2. In combination with afabric trimming member and feed dog, means for actuating said trimming member, including a clutch element, two shafts operatively connected with the feed dog and clutch element respectively, a driven shaft, an eccentric on said shaft, and means connecting said eccentric with each of said two shafts to' impart relative oscillatory rotation thereto.

3. In combination with a fabric trimming member and feed dog, means for actuating said trimming member, including a clutch element, two shafts operatively connected with the feed dog and clutch element respectively, a driven shaft, an eccentric on said shaft, means operatively connecting said eccentric with the feed dog operating shaft to impart oscillatory rotation thereto, and additional adjustable means operatively connecting said eccentric to the operating shaft for the clutch element to impart oscillatory rotation to the latter shaft in variable degree with respect to said feed dog operating shaft.

4. In combination with a fabric trimming member and feed dog, means for actuating said trimming member, including a clutch element, a pair of nested shafts operatively connected with the feed dog and clutch element respectively, a driven shaft, and power transmitting connections between said driven shaft and the nested shafts to impart relative oscillatory rotation to the latter shafts.

5. In combination with a fabric trimming member and feed dog, means for actuating said trimming member, including a clutch element, a pair of nested shafts operatively connected with the feed dog and clutch element respectively, a driven shaft, and power transmitting connections between said driven shaft and the nested shafts to impart relative oscillatory rotation to the latter shafts, said connections including relatively adjustable parts for varying the degree of rotation of one of said shafts relative to the other.

6. In combination with a fabric trimming member and feed dog, means for actuating said trimming member, including a clutch element, a pair of nested shafts operatively connected with the feed dog and clutch element respectively, a driven shaft, a power transmitting member on said shaft, means operatively connecting said member to the feed dog operating shaft, and additional means operatively connecting said member with the operating shaft for the clutch element, including relatively adjustable parts for varying the degree of rotation of the latter shaft relative to the feed dog operating shaft.

7. In combination with the needle operating shaft of a sewing machine, a rotatable trimming member, an operating element therefor, and means for intermittently rotating said member in synchronized relation with the stitch forming operation of the machine, including a shaft mounted beneath the bed plate of the machine, a reciprocatory member actuated by said shaft and directly coacting with the operating element independently of the material feed mechanism, and means for transmitting oscillatory rotation to said shaft from the needle operating shaft.

8. In combination with the needle operating shaft and four-motion feed dog of a sewing machine, a rotatable trimming member, and means for intermittently rotating said member and operating the feed dog in synchronized relation with each other, said means including a pair of shafts mounted beneath the bed plate of the machine, one of which is operatively connected with the feed dog, means operatively connecting said shaft'with the needle operating shaft, a reciprocatory element operable independently of the feed dog movement and connecting said trimming member with the other of said shafts, and means for transmitting oscillatory rotation to the latter shaft from the needle operating shaft.

respectively, and means for transmitting relative oscillatory rotation to said shafts from the needle operating shaft, including a common power transmitting member fixed to the latter shaft.

10. In combination with a trimming member and a member for feeding material thereto, a pair of nested actuating shafts operatively connected respectively with said trimming and feeding members, a driven shaft, and power transmitting connections between said driven shaft and the nested shafts to impart relative oscillation to the latter shafts.

11. In combination with a rotatable trimming member and a relatively movable feeding member, means for intermittently rotating said trimming member and operating the feeding member in synchronized relation with each other, including a pair of nested shafts, means operatively connecting said shafts with the trimming member and feeding member respectively, a power operated shaft, and means for transmitting relative oscillatory rotation to each of the first named shafts from said power operated shaft.

12. In combination with the needle operating shaft and feed mechanism of a sewing machine, actuating means for said feed mechanism, a rtatable trimming member, and means for intermittently rotating said member in synchronized relation with the stitch forming operation of the machine, including a shaft mounted beneath the bed plate of the machine, a reciprocatory member actuated by said shaft, means carried by said member and operatively connected with the trimming member, and means for transmitting oscillatory rotation to said shaft from the needle operating shaft, said latter means including rela tively adjustable parts for varying the oscillatory movements of said shaft independently of the actuating means for the feed mechanism.

13. In combination with a fabric trimming member and feed dog, means for independently operating said member and dog in timed relation, including relatively oscillatable co-centric actuating elements independently operable about a common axis, and means for variably regulating the oscillatory motion of the actuating element for the trimming member relative to the actuating element for the feeding member.

14. In combination with the needle operating shaft and feed mechanism of a sewing machine, a fabric trimming member mounted to rotate in a horizontal plane upon the upper surface of the machine bed plate, and means independent of the feed mechanism operatively connected with said needle operating shaft and including an actuating element for said trimming member mounted beneath the bed plate.

15. In combination with the needle operating shaft and feed mechanism of a sewing machine, a fabric trimming member mounted to rotate in a horizontal plane upon the upper surface of the machine bed plate, means mounted beneath the bed plate and operatively connected with said needle operating shaft for actuating the feed mechanism and trimming member in timed relation, said means including means for variably regulating the operative movements of said trimming member independently of the feed mechanism.

VICTOR J. SIGODA. 

